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4 years ago

Y=x+4 how to solve I need the know plaese

Chemistry

1 answer:

sweet [91]4 years ago

4 0

you can't solve that, you need more information in that equations like and x or an y.

Otherwise, the equation stays like that.

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Which of the following best explains the trend in ionization energy across a period?

Alina [70]

A) It decreases because the distance between the nucleus and outermost shell increases

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3 years ago

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The reaction 2HgO (s)→2Hg (I)+O2 (g) has a percent yield of 50%. You want to produce 100 g of Hg.

nevsk [136]

The mass of HgO needed for the reaction is 216 g

The correct answer to the question is Option C. 216 g

We'll begin by calculating the theoretical yield of Hg.

Actual yield of Hg = 100 g

Percentage yield = 50%

Theoretical yield of Hg =?

Theoretical yield = Actual yield / percentage yield

Theoretical yield = 100 / 50%

Theoretical yield of Hg = 200 g

Finally, we shall determine the mass of HgO needed for the reaction.

2HgO → 2Hg + O₂

Molar mass of HgO = 201 + 16 = 217 g/mol

Mass of HgO from the balanced equation = 2 × 217 = 434 g

Molar mass of Hg = 201 g/mol

Mass of Hg from the balanced equation = 2 × 201 = 402 g

From the balanced equation above,

402 g of Hg were produced from 434 g of HgO.

Therefore

200 g of Hg will be produce by = (200 × 434) / 402 = 216 g of HgO.

Thus, 216 g of HgO is needed for the reaction.

Learn more about stoichiometry:

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2 years ago

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Kepler's Laws of Planetary Motion. While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits.

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4 years ago

Which term best describes the important lives of information that scientists gather and record during an experiment

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Strong acid-titrated with strong base. Suppose the titration was reversed in question 2. If your titrated 30.0 mL of 0.1 M HCl w

lozanna [386]

Answer:

(a) pH = 1.0

(b) pH = 7.0

(c) 60 mL

Explanation:

(a) At the start of the titration there's no OH⁻ species yet.

pH = -log[H⁺]

And because HCl is a strong acid

[H⁺] = [HCl] = 0.1 M

Thus

pH = -log (0.1) = 1.0

(b) In every strong base-strong acid titration, the pH at the equivalence point is 7.0.

(c) Because<em> the concentration of HCl and NaOH are the same</em>, you would need<u> 30 mL of the NaOH solution to neutralize 30 mL of the HCl solution</u>, thus the total volume is 60 mL.

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4 years ago